Photocurable Composition Nanoparticle Dispersion
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Solution Overview
Problem
The dispersibility and optical properties of photocurable compositions used in nanoimprint lithography are affected by the aggregation of metal oxide nanoparticles, leading to uneven film thickness and degraded pattern transferability, particularly in applications requiring high refractive indices like 3D sensors and AR waveguides.
Innovation Solution
A photocurable composition comprising metal oxide nanoparticles with an average primary particle diameter of 50 nm or less, phosphoric acid (meth)acrylate, and a photopolymerization initiator, which improves dispersibility and optical properties by suppressing nanoparticle aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal oxide nanoparticles are added to increase refractive index, then optical properties are improved, but nanoparticle aggregation occurs leading to poor dispersibility
Solution Approach 1:
Silane-coupled metal oxide nanoparticles are used as an intermediary form that combines the high refractive index benefit with improved dispersibility. The silane coupling agent acts as a mediator between the metal oxide particles and the photocurable resin, preventing aggregation while maintaining optical properties
Solution Approach 2:
The invention uses composite metal oxide nanoparticles with silane coupling agents integrated into the photocurable resin system. This composite approach allows simultaneous achievement of high refractive index and good dispersibility by combining materials with complementary properties
2Stability of the object's composition
If surface treatment is applied to metal oxide nanoparticles to improve dispersibility, then dispersibility improves, but optical properties deteriorate
Solution Approach 1:
The invention optimizes the parameters of surface treatment by controlling the type and amount of silane coupling agent, particle size distribution, and treatment conditions. This allows achieving satisfactory dispersibility while minimizing the impact on optical properties through precise parameter control
3Manufacturing precision
If nanoparticle aggregation occurs, then film thickness uniformity deteriorates, but this affects pattern transferability
Solution Approach 1:
The metal oxide nanoparticles are pre-surface-treated with silane coupling agents before being incorporated into the photocurable composition. This preliminary action ensures uniform distribution and prevents aggregation during subsequent coating and curing processes, maintaining both film uniformity and pattern transferability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition achieves enhanced dispersibility and optical properties, such as high refractive index and reduced haze, facilitating improved pattern formation and transferability suitable for applications in 3D sensors and AR waveguides.
Implementation Method 1
a photocurable composition containing a photocurable resin that is cured by light (ultraviolet rays or electron beams)
Data Source
Figure 1(A)~2(F)
AI summary
Provided is a photocurable composition including metal oxide nanoparticles having an average primary particle diameter of 50 nm or less as a component (X), phosphoric acid (meth)acrylate as a component (P), and a photopolymerization initiator as a component (C).